Question

An ideal gas can’t be liquefied because
(a) its critical temperature is always above 0°C
(b) its molecules are relatively smaller in size
(c) it solidifies before becoming a liquid
(d) forces operated between its molecules are
negligible

Answer 1

Answer:

d is the correct answer

Answer 2

(d) forces operated between its molecules are negligible

Explanation:

Gases can be liquefied by lowering the temperature and increasing the pressure. An ideal gas has no inter-molecular force of attraction, so it cannot be liquefied by applying high pressure and decrying temperature. So, an ideal gas can’t be liquefied because forces operated between its molecules are negligible.

Option D is the answer.